“The presence of Jupiter actually protects Mercury, Venus, Earth, and Mars from repeated asteroid collisions!”.
The chances of a major asteroid hitting Earth are small – NASA believes there is a one-in-300,000 chance every year that a space rock which could cause regional damage will hit – but the devastating prospect is not impossible.
And when it does hit Earth, it could spell the end of humanity.
Physicist Rob van den Berg wrote on QA site Quora: “Small asteroids are of course pretty harmless, they evaporate in the atmosphere before they reach the ground.
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